Improvement in hot-air registers



E. D. NORGRUSS.

Hot-Air Registersa No.l48,l33. Patemedmarhawau.

Fay. 3;

a'rnivr OFFICE.

EDMUND D. vNORCROSS, OF BOSTON, MASSACHUSETTS.

IMPRQVENENT IN HOT-AIR REGISTERS.

Specification forming part of Letters Patent No. P18-,133, dated March3, 1874; application filed April 29, 1873.

To all whom it may concern:

Beit known that I, EDMUND D. Noncnoss, of Boston, Suffolk county,Massachusetts, have invented certain Improvements in HotAir Registers orVentilators, of which the following is a specification:

These improvements consist, iirst, in the combination, in a hot-airregister, of certain parts hereinafter speciiied, arranged together withthe intent of preventing, as far as possible, the heating of the screenaudits surrounding frame, and the transmission of heat to the iiooringsurrounding the register, and they consist, secondly, in certainmechanism combined with the register, to operate the damper thereof, ashereinafter described.

The drawings accompanying this specification represent, in Figures l and2, cross-sections of a register containing my improvements. Fig. 3 1s aface view, on a reduced scale, of the outer frame, which is affixed tothe oor or mop-board, and receives the screen. In these drawlngs, Arepresents a cast-iron screen composed of an outer iircumscribing band,B, and an interior body of suitable ornamental scroll-work or designs,or figures of any desired character, the bars of said screen beingformed preferably with sunken shallow grooves or channels on the upperside, forming narrow bands or ribs a a on the sides of the bars, whichmay be polished or left unpainted, while the metal in the grooves orchannels can be painted or japanned, the paint being protected from wearby the ribs a. Upon the rear side of the screen A, I cast a contin 'nousraised rib or ledge, c, which fits closely within the mouth of a box, d,composed of tin or other suitable non-conducting metal, this box beingof such depth as to remove the damper carried by it'to some distancefrom the screen, as shown in the drawings. Upon the bottom of theinterior of the case or box d I secure a plate, e, composed, preferably,of cast metal, and formed with a thimble, b, which enters a hole ofsimilar size formed in the botun, or other desired portion, of the box,an

or standard, g, being formed upon or applied to one side of the plate e,and against fue side of the box d, as shown in Figs. l and 2 of thedrawings. A circular damper, h, is placed within or immediately over theorifice fof the thimble b, and is supported upon the plate e by journalsor trunnions t' which enter boxes or bearings j k of the said plate e,one of these bea-rings, or the cap of the same, being composed, in thepresent instance, of the foot of the standard g, which overlaps it, thestandard in such event being confined to the plate c by a screw or bolt,which admits of insertion or removal of the damper. G, in theaccompanying drawings, represents an arm departing laterally from thecircumference of the damper to one side of one of its pivots, the freeend of this arm entering a slot or fork, l, createdin the lower part ofa swinging or oscillating lever or shipper, D, which is disposed alongside of the standard or post g before named, the lever being fulcrumedto such post by a stud, n, as shown in Figs. I and 2 of the drawings.rIhe outer arm o of the lever D is a sectoral plate, whose edge isserrated, toothed, or roughened, and extends a short distance throughthe screen A, in order to be accessible to a persons foot or hand. Bymeans of the lever or shipper D the damper may be opened or closed, aswill be at once apparent, and this construction enables me-to apply themode of operating the damper in whatever position the latter may beplaced with respect to the screen, or at whatever distance from it.

Owing to the few bearings of this mode of attaching and operating thedamper, and the lever erected upon it, very little power is required tooperate it, and no liability to derangement exists.

In addition to this the expense of manufacture is very small, and butone screw is to be used in setting or applying the register-that is, theone confining the post g to the plate o. E represents the open framewhich receives the screen A, and which is attached to the floor ormopboard of the apartment, the inner edges or sides of this frame beingcomposed of a thin ledge or rib, p, and a series of thin sunken bars, q,86o., which imite the said rib with the band or body of the frame, thescreen, as before stated, resting upon the rib, or upon a lip, r, turnedupon the upper edge of the box d. The only immediate connection betweenthe screen A and the frame E is the ledge p; consequently, any heatwhich might otherwise be imparted to the said frame by radiation fromthe screen A orbox d is insulated from it. The boX d, from its natureand depth, being also a non-conductorof heat, reduces to a Very smallamount the radiation of heat from the damper h or plate e, and, inconnection with the construction of the frame E, entirely dispenses withthe necessity of a soapstone plate in which to place the register, asnor required. by insurance companies.

This register or ventilator is siinple and durable in every respect, andcan be manufactured at a small comparative` cost.

It will be seen that the thiinble b, Which is attached to the hot-airpipe, is insulated from the register by the non-conducting box d.

I claiml. The hot-air register described, consistingof the frame E,screen A, box d, damper h,- and plate and thimble e b, said parts beingconstructed and arranged together substantially as herein shown and setforth.

2. The combination, with the damper, register, screen, and intermediatebox d, of the pivoted vibratory lever D, and arm c, attached to thedamper, and extending into a slot in said lever, substantially as andfor the purposes shown and set forth.

E. D. NORGROSS.

Witnesses W. E. BOARDMAN, GEO. E. HrcKs.

